Hand-regulating valve for rotation motors



May 22, 1923.

- 1,456,234 c. c. HANSEN HAND REGULATING V ALVE FOR ROTATION MOTORS Filed March 23', 1922 2 Sheets-Sheet 1 Q 5 ts N f Qfhk/ R4 INVENTOR Si l fizlwaflimaen Q Hi5 ATTQRN'E;

May 22, 1923.

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Filed March 23. 1922 Patented May 22, 1923.

omrao STATES CHARLES C. HAESEN, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLUBAND COMPANY, OF JERSEY CITY, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

' B AND-REGULATING VALVE FOR ROTATION MOTORS.

Application filed March 28, 1922. Serial No. 545,891.

To all whom it may concern:

Be it known that 1, CHARLES C. HANSEN, a citizen of the United States, and a resident of Easton, county of Northampton, and

State of Pennsylvania, have invented a certain Hand-Re ulating Valve for Rotat on Motors, of which the following is a spec1fication, accompanied by drawings.

This invention relates to fluid actuated rock drills of the hammer type, but more particularly to a hand operated valve for regulating the supply of motive fluid to the rotation motor of such a machine.

In my conding application, Serial No. Iii 514,816 filed ovember 12, 1921, I havedisclosed an automatic and manually ad ustable regulating valve for rotation motors, but the object of the present mvention, while in some respects similar, is to procure a simpler manually adjustable device by means of which the supply to the motor may be increased when desired, or in one modification, shut off entirely or regulated between these limits. Another object of the invention is to enable these results to be accomplished by means of a combined rotary and longitudinally movable valve, wh ch automatically returns to normal position after having been temporarily moved for a given adjustment.

.The drawings illustrate so much of a rock drill of the hammer type, as will serve to make the invention clear, and

Figure 1 is a side elevation partly 1n 1ongitudinal section of a rock drill having one form of my regulating valve applied thereto,

figure 2 is a detail transverse sectional View throughthe motor on the hue 2-2 of F i re 1, igure 3 is. a detail longitudinal vertical sectional .view similar to a portion of Figure 1,. with the valve moved inwardly to accelerate the motor,

Figure 4 is a detail View similar to Figure 3 of a modified form of regulating valve having both longitudinal and rotary movement'for adjusting purposes.

Figures 5,6 and 7 are detail transverse sectional views on the lines 5-5, 6--6 and so 7-.7 respectively of Figure 4, with the valve in starting or normal running position, and Figures'S, 9 and 10 are similar transverse sectional views with the valve closed.

'Be fe'rrin g to the drawings, the machine comprises a cylinder A, having a front head B provided with the rotation sleeve C through which the drill steel D extends in position to receive the impact of the reciprocatmg piston hammer E. A fluid actuated rotation motor of the gear type having the ears F, is mounted in the back end portion of the cylinder, and the back head H is provided with a valve chest J for the rotation motor regulating valve. The parts of the machine are secured together by the usual through bolts K. One of the gears F is provided with a spindle F having a. pinion G within the front head B meshing with a ear H on the rotation sleeve C, for 1m artlng rotation to the drill steel D.

otive fluid is supplied to the machine through the inlet L and passing from the usual throttle valve 0, enters the valve chest J through the passage P. From the valve chest, the motive fluid passes through the port Q and passage R to the rotation motor, exhausting rom the motor through the exhaust ports S into the exhaust space T which is open to atmosphere at each side between the back end portion G of the cylinder and the cylinder A.

The valve structure in the valve chest or casing J comprises a cylindrical valve cage U removably secured in said casing as by means of the screw threads V, and afiording communication between the fluid supply passage P and the motor. Within the cage U is located a valve stem W having an inner valve head X, a reduced neck Y and a shank Z movable longitudinally in the cage. A spring a. is adapted to be compressed between the cage and the handle or outer head 6 of the valve stem, for retracting the valve after it has been pushed or moved inwardly to increase the supply of motive fluid to the motor, and a stop limitin the movement of the valve is provided in the form of a pin 0, extending transversely through the cage and through a slot at in the shank Z of the stem.

The cage U as shown is provided with a supply port e in the side wall at the inner end of the cage, communicating with the bore of the cage, and the valve head X normally lies at rest in the cage, forwardly of said supply port 6, as indicated in Figure 1 of the drawing. The valve head X, however, is of such construction that it permits a continuous flow of motive fluid to the motor throu h the cage, in this instance the valve head eing of less diameter than the bore of the cage, so that fluid may pass continuously around the head as indicated by the arrows in Figure 1, when the throttle valve 0' 15 open. The supply to the motor 15 ncreased by moving the stem and valve head nwardly towards the motor to the position indicated in Fi re 3, for instance, in which the valve head is moved beyond the inner end of the cage which permits a eater flow of motive fluid to the motor. pon removing the fingers or hand from the outer-head b of the stem W, the retracting sprin a returns the valve to the position indicate in Figure 1. In order to seal the joint between the back head H and the motor casing G a metallic sleeve or thimble f is provided between these parts, connecting the port Q in the back head with the passage R in the motor casing, and a rubber packing g is inserted over the thimble g and adapted to be compressed between the ack head H and the motor casing G when the through bolts K are tightened.

In the modification of the invention, shown in Figures 4 to 10 inclusive, the valve chest or casing J is provided as before with a removable valve cage U having therein a rotatable and longitudinally movable valve stem W provided with a head X and a reduced or recessed portion rearwardly of the head. A coiled sprlng (1' located between the outer knurled head 6 of the valve stem and the valve cage, has one end 7' secured to the head and the other end it secu'red to the cage, so that the spring a not only acts as a retracting spring after the stem has been moved inwardly, but if the stem is rotated in a direction to wind the spring, .the valve and valve stem will be automatically returned or rotated in the opposite direction, to normal position, when the hand o'r fingers are removed from the knurled head 6'. A stop in the form of a pin 0' passes through the cage and throu h the recessed portion 0 of the valve stem or limitin the longitudinal movement of the stem his sto pin 0' also limits rotary movement of t e valve stem through an angle of about 180 as will be apparent.

The wall of the cage is provided with a supply po'rt e near its inner end and the v ve head X is formed with a port 7) through which motive fluid contmually passes to the motor when the valve is in normal ogen or running position, as indicated in igure 4 and in the detail views shown in Figures 5, 6 and 7.

By simply pushing or forcing the valve stem W and valve cad X inwardly, the flow of motive fluid to the motor is increased, since the valve head X will be car ried inwardly beyond the inner end oi the cage U and more fluid may flow to the motor. With the valve in the position indicated in Figure 4, illustrated in detail in Figures 5, 6 and 7, motive fluid is continually passed to the motor and this is the normal or running position. By rotating the valve through an arc of about 180 as indicated in detail in Figures 8, 9 and 10, motive fluid is entirely shut off from the motor. At intermediate rotary positions of the valve, the recessed portion h of the valve stem permits more or less fluid to pass to the motor as desired, and the valve will always be automatically returned to normal position by releasing the spring a.

I claim:

1. In a fluid actuated rock drill of the hammer't pe, the combination of a rotation motor an a valve for controlling the supply of fluid to said motor, said valve comprising a casing, a cylindrical valve cage removably secured in said casing and afio'rding communication between the fluid supply and the motor, a valve stem havin an inner valve head, a reduced neck an a shank movable longitudinally in said cage, 3. spring for normally retracting the stem, and a stop limitin the movement of the stem, the valve hea permitting a continuous flow of motive fluid to the motor through the cage, and the supply to the motor being increased by moving the stem and valve head inwardly towards the motor.

2. In a fluid actuated rock drill of the hammer type, the combination of a rotation motor and a valve for controlling the supply of fluid said motor, said valve comprising a casing, a cylindrical valve cage removably secured in said casing and-affording communication between the fluid supply and the motor, a valve stem having an inner valve head, a reduced neck and a shank movable longitudinally in said cage, a spring for normally retracting the stem and a stop limiting the movement of the stem, the valve head being of less diameter than the bore of the cage, whereby fluid may continually be applied to the motor through the valve and the suppl may be increased by moving the stem an the valve head inwardly towards the motor to permit more fluid to flow past the reduced neck on the spindle.

3. In a fluid actuated rock drill of the hammer type, the combination of a rotation motor and a valve for controlling the supply'of fluid to said motor, said valve comprising a casing, a cylindrical valve cage removabl inserted in the casing and havin a longitudinal bore communicating with t e inlet of the'motor, a supply port in the wall of said cage at Its inner end, .a valve stem movable longitudinally in said cage and having a valve head and a reduced neck at its inner end, a retracting spring and a sto for the valve stem, the valve head being of iess diameter than the bore of the cage, and normally lying in the bore of the 5 cage forwardly of the said supply port, whereby fluid is continuously supplied to the motor and the supply is increased by forcing the valve stem. inwardly towards the motor to carry the valve head beyond the inner end of the cage. 19

In testimony whereof I have signed this specification.

CHARLES C. HANSEN. 

